Compute seasonal relatives for this data using the simple averaging $($SA$)$ method:

$\backslash$table$[[$Quarter$,$Year $1,$Year $2,$Year $3,$Year $4],[1,2,1,4,7],[2,6,9,8,12],[3,3,3,4,6],[4,4,5,5,7]]$

$($Round all your answers to three decimal points.$)$

$\backslash$table$[[,],[$Quarter $1,],[$Quarter $2,],[$Quarter $3,],[$Quarter $4,]]$